The first 50 mothers will receive a special gift from the Columbia River Trading Company. A brunch buffet will be offered in the Basalt Rock Café from 11 a.m. to 2 p.m.

Take a guided wildflower identification walk at 10 a.m. and 3:30 p.m. Native plant seedlings from Milestone Nursery will be for sale from 10 to 3 p.m. Live Birds of Prey raptor shows will be at 11 a.m. and 2:30 p.m.

Portland author Vince Welch will be giving a presentation from 12:30 to 2 p.m. in the Murdock Theatre on his book “The Last Voyageur: Amos Burg and the Rivers of the West.” Welch’s biography highlights Burg’s adventures as a writer and photographer for National Geographic magazine and the pioneering films he recorded of the great rivers of Western North America before dams changed them forever. Meet the author before and after his presentation during a book signing from 11 to 3.